期刊
ELECTROCHIMICA ACTA
卷 114, 期 -, 页码 681-687出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.10.085
关键词
Dye-sensitized solar cells; P25 powder; Separation; Anatase; Transparent TiO2 electrodes
资金
- Program for New Century Excellent Talents in University [NCET-10-0066]
- 863 project [2013AA031502]
- National Science Foundation [51202046]
- China Postdoctoral Science Foundation [2012M510144, 2013T60366]
- Fundamental. Research Funds for the Central Universities [HIT. NSRIF. 2013006]
- [2011RFLXG006]
The anatase and rutile phases existing in commercially available P25 powder were separated according to their different particle size and chemical affinity. Firstly, electrical double layer was established on TiO2 surface to achieve a highly dispersed TiO2 colloid due to electrostatic repulsive forces. Additionally, strong electrolyte HCl was added to neutralize the weak electrical double layer of rutile particles, and makes them precipitated from TiO2 colloid priorly by centrifugal force. As the amount of HCl increased from 0 to 2 ml, the anatase percent increased from 83.2 to 100%, the diameter decreased from 30.0 to 19.7 nm while the specific surface increased from 52.9 to 76.3 m(2)/g. Further, the conversion efficiency of dye-sensitized solar cells fabricated from the separated powder increased from 8.52 to 10.1% under 100 mW cm(-2) AM 1.5 illumination. (C) 2013 Elsevier Ltd. All rights reserved.
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